Wristwatch



FIG. 1 is a front view thereof of a wristwatch showing my new design;

FIG. 2 is a perspective view of the front and right side thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear elevational view of the face thereof.

The broken lines in the drawing figures show environmental structures only, and form no part of the claimed design. 

CLAIM The ornamental design for a wristwatch, as shown and described. 